Dmt symbol repetition in the presence of impulse noise

Abstract

With the current initialization procedures defined in the VDSL and ADSL standards, even though the xDSL system could operate in Showtime in an impulse noise environment where symbols are being corrupted, the transceivers would not be able to reach Showtime because initialization would fail due to initialization message failure. Through the use of an improved initialization procedure for communication systems, operation in environments with higher levels of impulse noise is possible.

1 - 43 . (canceled) 
     
     
         44 . A multicarrier transceiver comprising:
 a receiver capable of determining a repetition rate for DMT (Discrete Multitone Modulation) symbols;   a transmitter capable of transmitting a first message during multicarrier transceiver initialization, wherein the message indicates the repetition rate;   the receiver further capable of receiving a second message during the multicarrier transceiver initialization, wherein DMT symbols in the second message are repeated a number of times in accordance with the repetition rate indicated in the first message,   wherein the second message comprises a plurality of information bits and a plurality of CRC (Cyclic Redundancy Check) bits, and   wherein the second message comprises a plurality of DMT symbols and at least one DMT symbol in the second message received during the multicarrier transceiver initialization comprises at least one CRC bit of the plurality of CRC bits and no information bits.   
     
     
         45 . The transceiver of  claim 44 , wherein the receiver is capable of determining the repetition rate based on an INP (Impulse Noise Protection) value. 
     
     
         46 . The transceiver of  claim 44 , wherein the receiver is capable of determining the repetition rate based on impulse noise measurements. 
     
     
         47 . The transceiver of  claim 44 , wherein the receiver is capable of determining the repetition rate based on crosstalk measurements. 
     
     
         48 . A multicarrier transceiver comprising:
 a receiver capable of determining a repetition rate for DMT (Discrete Multitone Modulation) symbols;   a transmitter capable of transmitting a first message during multicarrier transceiver initialization, wherein the message indicates the repetition rate;   the transmitter further capable of transmitting a second message during the multicarrier transceiver initialization, wherein DMT symbols in the second message are repeated a number of times in accordance with the repetition rate indicated in the first message, and   wherein the second message comprises plurality of information bits and a plurality of CRC (Cyclic Redundancy Check) bits and wherein the second message comprises a plurality of DMT symbols and at least one DMT symbol in the second message transmitted during the multicarrier transceiver initialization comprises one CRC bit of the plurality of CRC bits and no information bits.   
     
     
         49 . The transceiver of  claim 48 , wherein the receiver is capable of determining the repetition rate based on an INP (Impulse Noise Protection) value. 
     
     
         50 . The transceiver of  claim 48 , wherein the receiver is capable of determining the repetition rate based on impulse noise measurements. 
     
     
         51 . The transceiver of  claim 48 , wherein the receiver is capable of determining the repetition rate based on crosstalk measurements. 
     
     
         52 . A non-transitory computer-readable information storage media, having stored thereon instructions, that when executed by one or more processors in a transceiver, cause to be performed a method comprising:
 determining, by a receiver, a repetition rate for DMT (Discrete Multitone Modulation) symbols;   transmitting, by a transmitter, a first message during multicarrier transceiver initialization, wherein the message indicates the repetition rate;   receiving, by the receiver, a second message during the multicarrier transceiver initialization, wherein DMT symbols in the second message are repeated a number of times in accordance with the repetition rate indicated in the first message, and   wherein the second message comprises plurality of information bits and a plurality of CRC (Cyclic Redundancy Check) bits and wherein the second message comprises a plurality of DMT symbols and at least one DMT symbol in the second message received during the multicarrier transceiver initialization comprises one CRC bit of the plurality of CRC bits and no information bits.   
     
     
         53 . The non-transitory computer-readable information storage media of  claim 52 , wherein the determining of the repetition rate is based on an INP (Impulse Noise Protection) value. 
     
     
         54 . The non-transitory computer-readable information storage media of  claim 52 , wherein the determining of the repetition rate is based on impulse noise measurements. 
     
     
         55 . A non-transitory computer-readable information storage media, having stored thereon instructions, that when executed by one or more processors in a transceiver, cause to be performed a method comprising:
 determining, by a receiver, a repetition rate for DMT (Discrete Multitone Modulation) symbols;   transmitting, by a transmitter, a first message during multicarrier transceiver initialization, wherein the message indicates the repetition rate;   transmitting, by the transmitter, a second message during the multicarrier transceiver initialization, wherein DMT symbols in the second message are repeated a number of times in accordance with the repetition rate indicated in the first message,   wherein the second message comprises plurality of information bits and a plurality of CRC (Cyclic Redundancy Check) bits and wherein at least one DMT symbol in the second message transmitted during the multicarrier transceiver initialization comprises one CRC bit of the plurality of CRC bits and no information bits.   
     
     
         56 . The non-transitory computer-readable information storage media of  claim 55 , wherein the determining of the repetition rate is based on an INP (Impulse Noise Protection) value. 
     
     
         57 . The non-transitory computer-readable information storage media of  claim 55 , wherein the determining of the repetition rate is based on impulse noise measurements. 
     
     
         58 . A multicarrier transceiver comprising:
 a receiver capable of determining, during multicarrier transceiver initialization, a repetition rate for DMT (Discrete Multitone Modulation) symbols;   a transmitter capable of transmitting a first message during the multicarrier transceiver initialization, wherein the message indicates the repetition rate;   the receiver further capable of receiving a second message during the multicarrier transceiver initialization, wherein DMT symbols in the second message are repeated a number of times in accordance with the repetition rate indicated in the first message,   wherein the second message comprises plurality of information bits and a plurality of CRC (Cyclic Redundancy Check) bits,   wherein the second message comprises a plurality of DMT symbols and at least one DMT symbol in the second message received during the multicarrier transceiver initialization comprises one CRC bit of the plurality of CRC bits and no information bits.   
     
     
         59 . The transceiver of  claim 58 , wherein the receiver is capable of determining the repetition rate based on an INP (Impulse Noise Protection) value. 
     
     
         60 . The transceiver of  claim 58 , wherein the receiver is capable of determining the repetition rate based on impulse noise measurements. 
     
     
         61 . The transceiver of  claim 58 , wherein the receiver is capable of determining the repetition rate based on crosstalk measurements. 
     
     
         62 . A multicarrier transceiver comprising:
 a receiver capable of determining, during multicarrier transceiver initialization, a repetition rate for DMT (Discrete Multitone Modulation) symbols;   a transmitter capable of transmitting a first message during the multicarrier transceiver initialization, wherein the message indicates the repetition rate;   the transmitter further capable of transmitting a second message during the multicarrier transceiver initialization, wherein DMT symbols in the second message are repeated a number of times in accordance with the repetition rate indicated in the first message, and   wherein the second message comprises plurality of information bits and a plurality of CRC (Cyclic Redundancy Check) bits and wherein the second message comprises a plurality of DMT symbols and at least one DMT symbol in the second message transmitted during the multicarrier transceiver initialization comprises one CRC bit of the plurality of CRC bits and no information bits.   
     
     
         63 . The transceiver of  claim 62 , wherein the receiver is capable of determining the repetition rate based on an INP (Impulse Noise Protection) value. 
     
     
         64 . The transceiver of  claim 62 , wherein the receiver is capable of determining the repetition rate based on impulse noise measurements. 
     
     
         65 . The transceiver of  claim 62 , wherein the receiver is capable of determining the repetition rate based on crosstalk measurements.